25542352613 has 4 divisors (see below), whose sum is σ = 25570514880. Its totient is φ = 25514190348.

The previous prime is 25542352607. The next prime is 25542352657. The reversal of 25542352613 is 31625324552.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 25542352613 - 2²² = 25538158309 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25542351613) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14079773 + ... + 14081586.

It is an arithmetic number, because the mean of its divisors is an integer number (6392628720).

Almost surely, 2^25542352613 is an apocalyptic number.

It is an amenable number.

25542352613 is a deficient number, since it is larger than the sum of its proper divisors (28162267).

25542352613 is an equidigital number, since it uses as much as digits as its factorization.

25542352613 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28162266.

The product of its digits is 216000, while the sum is 38.

The spelling of 25542352613 in words is "twenty-five billion, five hundred forty-two million, three hundred fifty-two thousand, six hundred thirteen".